Hydrogeochemical characteristics of the aquifers with variable arsenic concentrations

B. Nath, J. S. Jean, D. Stüben, D. Chatterjee, S. B. Mallik

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Arsenic (As) concentrations in groundwater range between >0.1 and 476μl -1, with localized high concentrations in abandoned meander/channel deposits. The groundwater flow lines tend to be deflected away from the high As aquifer. This indicates both low permeability and low recharge rates, as well as an abundance of fine-grained sediments associated with high As areas. These factors allow for high groundwater residence time for sediment-water interaction to occur, thus facilitating the release of As from meander/channel deposits. Borehole lithology analysis confirms our assumption, where finer-sediments are associated with the high As concentrations. Moreover, the presence of silt/clay intercalations within the sandy aquifer at the sites showing high As seems to influence As mobility.

Original languageEnglish
Title of host publicationWater-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
Pages1097-1100
Number of pages4
Publication statusPublished - 2007 Dec 1
Event12th International Symposium on Water-Rock Interaction, WRI-12 - Kunming, China
Duration: 2007 Jul 312007 Aug 4

Publication series

NameWater-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
Volume2

Other

Other12th International Symposium on Water-Rock Interaction, WRI-12
CountryChina
CityKunming
Period07-07-3107-08-04

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Water Science and Technology

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